Bug 1023389

Summary:	[virsh cmd] Error message is not clear for commands blkiotune and schedinfo
Product:	Red Hat Enterprise Linux 6	Reporter:	zhengqin <zsong>
Component:	libvirt	Assignee:	Martin Kletzander <mkletzan>
Status:	CLOSED WONTFIX	QA Contact:	Virtualization Bugs <virt-bugs>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	6.5	CC:	acathrow, dyuan, jdenemar, lcui, mzhan, tzheng
Target Milestone:	rc	Keywords:	Upstream
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:	1023366	Environment:
Last Closed:	2014-04-04 20:56:36 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1023366
Bug Blocks:

Description zhengqin 2013-10-25 10:23:00 UTC

+++ This bug was initially created as a clone of Bug #1023366 +++

Description
For non-root user, when executing commands "virsh blkiotune <domainVM>" or "virsh schedinfo <domainVM>", error will occurs but error message is not clear.


Version:
virt-manager-0.10.0-4.el7.noarch
libvirt-1.1.1-9.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Issue the following command to create a user and set its password:
#useradd non-root ;  passwd non-root

2. Switch to user "non-root" by command "su - non-root", and create or import a VM named "DomainU1"

3. Execute commands "blkiotune" or "schedinfo" under "non-root" user, and error will occurs.


Actual results:
1. [non-root@localhost ~]$ virsh blkiotune DomainU1
error: Unable to get blkio parameters
error: Requested operation is not valid: blkio cgroup isn't mounted

2. [non-root@localhost ~]$ virsh schedinfo  DomainU1
Scheduler      : Unknown
error: Requested operation is not valid: cgroup CPU controller is not mounted


The above error message is not clear.



Expected results:
Error message should be clear and improved.


Additional info:
This issue occurs both on RHEL7 and RHEL6.5

Comment 1 zhengqin 2013-10-25 10:23:56 UTC

This issue also occurs on latest RHEL6.5

Comment 2 zhengqin 2014-02-21 06:09:34 UTC

could reprodce on rhel6u5 with libvirt-0.10.2-29.el6_5.2.x86_64


$virsh schedinfo rhel6u5_qcow3
Scheduler      : Unknown
error: Requested operation is not valid: cgroup CPU controller is not mounted

Comment 3 Jiri Denemark 2014-04-02 08:57:00 UTC

Fixed upstream with commit v1.2.2-48-g45ad1ad:

commit 45ad1adb4a5ae5ce46287c570e87abab6ffe62d6
Author: Martin Kletzander <mkletzan>
Date:   Thu Feb 27 13:10:32 2014 +0100

    qemu: Reject unsupported tuning in session mode

Comment 5 RHEL Program Management 2014-04-04 20:56:36 UTC

Development Management has reviewed and declined this request.
You may appeal this decision by reopening this request.